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renegade805
03-11-2011, 05:41 AM
Any one with experience with yz85 in BLASTER frame. What to watch out for fabrication ect. Carb issues aorbox vs pod. 03 roller with02 yz85 fmf sst

gistmarrs
03-11-2011, 03:13 PM
I've got a YZ85 mod in a Cobra frame. The biggest issue that I have had with it is trying to get it to launch. Since it doesn't have a power valve, it doesn't have as much torque as the PV motors do. Once it gets up to rpm, it runs really well. It really forces the rider to stay in the perfect gear all of the time.

Your mod will probably weigh a bit more and may make it noticeably sluggish off of the line. You might want to switch out the SST to a Fatty and add a torque spacer in front of the reeds. Those two changes should help it.

91gtig60
03-11-2011, 10:48 PM
i am putting a yz85 in a pitster. and i sent my cylinder to eric gore, he mods the base of cyl to change exhaust timming for more low end and a smother band. and its only 90$. also you can do a flywheel weight that will help also
Originally posted by gistmarrs
I've got a YZ85 mod in a Cobra frame. The biggest issue that I have had with it is trying to get it to launch. Since it doesn't have a power valve, it doesn't have as much torque as the PV motors do. Once it gets up to rpm, it runs really well. It really forces the rider to stay in the perfect gear all of the time.

Your mod will probably weigh a bit more and may make it noticeably sluggish off of the line. You might want to switch out the SST to a Fatty and add a torque spacer in front of the reeds. Those two changes should help it.

renegade805
03-12-2011, 05:30 AM
I have an 05 CR motor i may use instead
Anyone with experience with these

robinson446
03-14-2011, 05:56 PM
we had one done with fmf pipe and shorty and port and polish with vforce reeds hinsen clutch and tranny done so you could shift without clutch it was a screemer beat any 300 ex and 200 blasters all day long

SMS
03-19-2011, 03:17 PM
here is one i did back in early 2000 for gnc mx

renegade805
03-21-2011, 05:02 AM
05 cr 85 I believe stock gearing was 15/55 what gearing is recommended for tje blaster chassis plus 2 swinger motocross

gistmarrs
03-21-2011, 10:00 AM
That's not easy to answer. It depends on what tires you are using, track length, soil conditions, etc.

We run 15/42 on some tracks, and 15/46 on others. We'll even drop to 14/46 on some really small flat tracks in sticky conditions.

Your best bet might be to ask people that run the same tracks that you do.

robinson446
03-21-2011, 03:59 PM
WE RAN 48 REAR 15 FRONT

renegade805
03-21-2011, 04:02 PM
How was the bottom and with that gearing on the cr did it launch

lilman
03-23-2011, 08:44 PM
we found the cr with dep pipe was great,gearing depended on track and conditions

renegade805
03-29-2011, 06:05 PM
CR rear mount is wider than space in swinger and bolt diameter of blaster swinger is bigger than CR. Next problem if I line up sprockets kick starter doesn't clear frame. Any one with solution or kits for CR blaster conversion they seem popular but I think everyone had sent theirs out and not modded themselves.